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Super-slim profile, big-time power

Car amps have come a long way. Kenwood's Excelon XR900-5 car amplifier can power your entire audio system while taking up an astonishingly small amount of space — it's about the size of a piece of computer paper, and it stands only 2" tall. But this compact 5-channel workhorse will send 60 watts RMS to each of your front and rear speakers, along with up to 600 watts RMS to your subs. You could also use the XR900-5 in 3-channel mode to drive a pair of high-performance speakers or components with 150 watts RMS each, while still feeding 600 watts RMS to your sub.

Designed for optimum efficiency

Kenwood packed this amp with space-saving features. Class D technology reduces the size of the power supply, while the internal heatsink is tilted to reduce height without compromising the amp's cooling system. Recessed power and speaker wire terminals help to further reduce the amp's footprint, protect the connections, and give your installation a neat, professional look.

Controls for the best sound

You can contour the sound with high- and low-pass filters so your full-range speakers play efficiently and sound their best. The front and rear channels have separate gain and filter controls so you can adjust for different types of speakers. The subwoofer channel features its own low-pass filter that'll send the correct frequencies to your sub and enclosure, with an adjustable bass boost that adds some low-end punch when you want it.

My system has plenty of power. Who needs an amp?

You might think you don't need an amp because you have a 400-watt system in your car, or because your new stereo puts out 50 watts a channel. But those are peak wattage ratings, which may boil down to 15 or 20 watts per channel, using the more realistic RMS rating. An amp sends your speakers the power they need to deliver your music with clarity and impact, whether you're using factory speakers or high-performance components. And low-frequency reproduction requires lots of power, so an amp is an absolute must if you're adding a sub to your system.

Product Research

Features

CEA-2006 Compliant: CEA-2006 is a system of testing and
measurement methods for mobile audio amplifiers. This voluntary standard advocates
a uniform method for measuring an amplifier's RMS power output and signal-to-noise
ratio. The criteria for measuring power uses a DC input voltage of 14.4 volts and
the RMS power output is measured into a 4-ohm load, with 1% or less Total Harmonic
Distortion plus noise (THD+N), and over a frequency range of 20 Hz to 20 kHz, when
applicable. Signal-to-Noise ratio is measured in weighted absolute decibels (dBA)
at a reference of 1 watt into 4 ohms. CEA-2006 allows consumers to compare car
amplifiers and receivers on an equal basis. Using CEA-2006 criteria, the Kenwood
XR900-5 is rated at 60 watts RMS x 4 plus 400 watts RMS x 1 (subwoofer) with a
78 dBA signal to noise ratio.

Specifications: The manual also lists these non CEA-2006
compliant specifications:

Power:

Full Range: 75 watts x 4-channels
(into 2Ω at 1 kHz, with no more than 1% THD, 14.4
volts)

Class D Amplifier Design: The amplifier design is Class D,
which uses digital switching power supplies. The result is much higher efficiency
(less heat generated) than Class AB.

5-Channel Design: The XR900-5 is made up of three sections,
two full range stereo amps (labeled A and B, typically used to power front and
rear speakers) and a subwoofer amp (1-channel). The front and rear amps are
independently bridgeable, meaning the XR900-5 can be used as a 5-channel,
4-channel, or 3-channel amp. The minimum impedance for each section is 2Ω,
4Ω when bridged.

Crossovers: The front, rear, and subwoofer amplifier sections
have independent crossover controls. The front and rear crossovers can be set to
high-pass or turned off (full range). The subwoofer crossover is low-pass only and
cannot be bypassed. The crossover point for each is continuously variable from 50
to 200 Hz. The high-pass crossover slope is 12dB per octave and the low-pass
crossover slope is 24dB per octave.

Bass Boost: The bass boost circuit for the subwoofer section
is centered at 40 Hz; boost is variable from 0 to +18 dB.

Aluminum Heat Sink: The aluminum heat sink increases the
amplifier's heat dissipation efficiency, increasing the life of the amplifier.

Speaker Output: five pair of set screw
terminals (left and right A channels, left and right B
channels, and sub); accommodate bare wire up to 10-gauge

Fuses: three 40 amp ATO fuses

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Amazing Compact Amp

This little amp is small yet so powerful. Installed in a Honda Civic 2007 LX sedan, mounted on a sub. No bigger than a sheet of computer paper and just a couple inches tall. It packs quite a punch for something so small. No hisses or pops or any kind of audible signature of its own. Powered up and listening to a variety of genres, music is crystal clear. Have it powering 2 pairs of Infinity Kappa 62.11i and a Kicker 40DCWS102 subwoofer so RMS ratings are matched perfectly. At 3/4 volume, my car rumbles (not the annoying rattles) and music from the entire range is clear. Completely happy with this purchase.

Fantastic amp for the money

I purchase this amp because it was on sale and also because it has a very small footprint since I will be installing in my GMC Sierra. Crutchfield shipped it extremely fast. I've not installed it yet but I know I'll be happy with it. All and all, I'm a very satisfied customer and will be making future purchases here.

Pros:5 channel, small footprint, lots of power and finally the good Kenwood name behind it.

Full system in small package

Wanted a single amp to power all the door speakers and subs in my 2013 gmc sierra crew. This nice little amp has lots of power for its size and is small enough to be mounted anywhere. Amp is power 6.5 alpine componants in the front doors and alpine 6.5 in the rear doors. The sub channel is powering 2 jl audio 10" w0 subs. Very clean sound and plenty of power on tap. The single amp made for a simple and clean install.

Good amp (so far)

This Kenwood replaced a JL Audio XD600 that developed intermittent issues with channel 1. So far it works just fine. Visually though, the Kenwood's physical construction is a bit underwhelming. The top is solid aluminum but the rest is sheet metal. The XD600 felt hefty through out in contrast. The Kenwood does depend on fan cooling & this probably allowed for the cheaper construction.... but still... I am glad I bought the refurbished model; if I paid the "new" price, I think I'd have been quite disappointed.

Pros:Easy to install. Works just fine.

Cons:Low budget construction... appears to be "less" than other older Kenwood Amps I've owned. Unit does run hot... hope the fan lasts a long time.

It's Alright

Written By sirbOOm, Atlanta, GA on Monday, November 11, 2013

The sub channel of this amplifier, despite the similar amplification rating, does not produce the bass impact as does an Alpine PDX-M6, Kenwood XR-1S, or even the sub channel from a Kenwood XR-5s. My bass is muddy/not tight in comparison. I set gains with the SMD DD-1 on all amplifiers and the test was a direct A/B comparison when I had all of these amplifiers from previous systems. This was my experience.

AWESOME LITTLE AMP

Written By BAGWURX, CLEVELAND TX on Saturday, July 27, 2013

I HAVE THE FRONT AND REAR CHANNELS BRIDGED ON 1 SET OF Kenwood Excelon KFC-XP184C7" components AND THE SUB CHANNEL PUSHING 1 Kicker 40CWRT101CompRT shallow-mount 10" subwoofer with dual 1-ohm voice coil. This amp provides more than enough power for my '72 Chevy c10..... dynamat will be my next investment....!

Pros:price, small in size, fits under just about any seat, more than enough power.....!

Cons:no remote mount sub control but I won't deduct any stars for that. my headunit has sub control...!

Bang bang

This is a sweet amp. Class D digital with a very small form factor. Fits under the seat perfectly in my Fusion. My unit is powering a pair of 10 inch subs, a pair 6x8 components and a pair of 6x8 4-ways. It really sounds good, I couldn't be happier.